20102121020212 has 96 divisors (see below), whose sum is σ = 44232345126144. Its totient is φ = 7830100270080.

The previous prime is 20102121020083. The next prime is 20102121020249. The reversal of 20102121020212 is 21202012120102.

It is a happy number.

It is a super-2 number, since 2×20102121020212² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 159183048 + ... + 159309280.

It is an arithmetic number, because the mean of its divisors is an integer number (460753595064).

Almost surely, 2^{20102121020212} is an apocalyptic number.

20102121020212 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20102121020212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22116172563072).

20102121020212 is an abundant number, since it is smaller than the sum of its proper divisors (24130224105932).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20102121020212 is a wasteful number, since it uses less digits than its factorization.

20102121020212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 130550 (or 130526 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 20102121020212 its reverse (21202012120102), we get a palindrome (41304133140314).

The spelling of 20102121020212 in words is "twenty trillion, one hundred two billion, one hundred twenty-one million, twenty thousand, two hundred twelve".